Here is the full list of all 48 Dead Island achievements. It takes around 40-50 hours to unlock all of the achievements on Windows.
Play Dead Island at least 28 days after starting it for the first time.
Complete act 4.
Complete act 3.
Finish 75 quests cumulatively.
Kill a Butcher using an axe
Complete act 2.
Find 60 collectibles.
Kill 250 zombies with modified weapons.
Reach level 25.
Kill a Suicider with a grenade.
Kill 50 human enemies.
Customize 25 weapons
Complete act 1.
Kill 5 Infected in a row with a single blow.
Drive a total distance of 10 kilometers.
Create weapons to rival the gods of fire or thunder.
Kill 250 zombies using edged melee weapons.
Save 5 people besieged by zombies.
Travel a distance of 20 kilometers on foot.
Kill 50 zombies using a vehicle.
Sever 100 limbs.
Reach level 10.
Create a customized weapon.
Kill a zombie with 10 different melee weapons.
Breach a locked door with the first blow.
Use a hammer to kill a series of 15 zombies without taking damage.
Set 10 zombies on fire simultaneously.
Kill 10 zombies in a row with headshots.
Kill 250 zombies using blunt melee weapons.
Kill 250 zombies using firearms.
Kill 25 zombies with your bare fists.
Kill an Infected with a grenade blast.
Explore the entire island.
Heal yourself with a medkit 100 times.
Use a large medkit to heal an injury of 5% or less.
Complete act 1 with 4 different characters.
Reach level 50
Find 120 collectibles.
Join another player's game.
Play with 10 different co-op partners for at least 15 minutes each.
Play in a co-op team of 4 different playable characters.
Complete 5 quests in a single co-op game with the same partners.
Complete 25 quests while playing with at least one co-op partner.
Complete 5 quests with 3 co-op partners.
Kill 100 enemies with Fury attacks.
Kill 150 enemies using Analog Fighting controls.
Kill a Ram using tackle skill.
Loot 25 Exceptional Weapons.